This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A220127 #12 Sep 06 2021 01:45:32 %S A220127 1,1,2,3,5,9,15,26,44,75,254,470,1130,2150,4369,8889,17112,33235, %T A220127 62619,117687,259213,500978,1073742,2114851,4334588,8817832,17673956, %U A220127 35420952,69871967,137274169,281650158,556043329,1139084899,2264971273,4589226181,9256382600 %N A220127 Number of tilings of a 10 X n rectangle using integer-sided rectangular tiles of area 10. %H A220127 Alois P. Heinz, <a href="/A220127/b220127.txt">Table of n, a(n) for n = 0..100</a> %e A220127 a(4) = 5, because there are 5 tilings of a 10 X 4 rectangle using integer-sided rectangular tiles of area 10: %e A220127 ._._._._. .___._._. ._.___._. ._._.___. .___.___. %e A220127 | | | | | | | | | | | | | | | | | | | | %e A220127 | | | | | | | | | | | | | | | | | | | | %e A220127 | | | | | | | | | | | | | | | | | | | | %e A220127 | | | | | | | | | | | | | | | | | | | | %e A220127 | | | | | |___| | | | |___| | | | |___| |___|___| %e A220127 | | | | | | | | | | | | | | | | | | | | %e A220127 | | | | | | | | | | | | | | | | | | | | %e A220127 | | | | | | | | | | | | | | | | | | | | %e A220127 | | | | | | | | | | | | | | | | | | | | %e A220127 |_|_|_|_| |___|_|_| |_|___|_| |_|_|___| |___|___| %Y A220127 Column k=10 of A220122. %K A220127 nonn %O A220127 0,3 %A A220127 _Alois P. Heinz_, Dec 06 2012